Bootstrap Confidence Intervals & Permutation Tests

Fit Linear Regression Model

Supply your own data to construct an interactive scatterplot and superimpose a regression line. Obtain the intercept, slope, r and r-squared. Dispaly and analyze residuals. Make predictions or obtain confidence or prediction intervals.

Errors and Power

Explore statistical concepts in an interactive way

The following apps have graphs that update with clicks on buttons or sliders. Each explores a different statistical topic and allows results to be saved. ​Click on a picture to start the corresponding app.

Inference for a Mean

Find confidence intervals and test hypo-theses about a population mean. Visualize the interval or P-value.

Explore Coverage

What does 95% confidence mean? What affects the width of an interval? Visualize with intervals for proportions or means.

Construct interactive scatterplots, hover over points, move them around or overlay a smooth trend line. Find the correlation coefficient r. Built the sampling distribution of r via bootstrapping or permutation, one resample at a time.